Date

rheology Articles

In this study, the effects of the content of carbon black (CB) nanoparticle on the morphology of the emulsion polymer blends were investigated. The immiscible polymer blend was prepared with polystyrene (PS) and polypropylene (PP) in the absence and presence of different contents of CB nanoparticle in a twin screw mini extruder. The blend morphology was determined by Scanning Electron Microscopy ...

Nanobiotechnology provides powerful tools for manipulating cells with nanometric resolution and with simultaneous measurement of force with pN resolution. We review the application of atomic force microscopy (AFM) and magnetic tweezers for probing cell nanomechanics. AFM measures the mechanical properties of the cell by indenting its surface by means of a flexible cantilever with a sharp tip at ...

Liquids with non-Newtonian properties are presented in many engineering areas, as for example in membrane bioreactors where active sludge exhibits shear thinning properties. Therefore, the ability to determine the rheology's dependence on shear is important when optimising systems with such liquids. However, rheometers capable of determining the viscosity are often expensive and so a ...

Exopolysaccharides play an important role in the rheology and texture of fermented foods, and among these β-glucans have immunomodulating properties. We show that the overproduction of the Pediococcus parvulus GTF glycosyltransferase in an uncapsulated Lactococcus lactis strain results in synthesis and secretion (300 mg liter–1) of a ...

The behaviour of the drilling fluids under high temperature is extremely important for drilling deep wells. Most commercial oil-base drilling fluid systems have limitations such as reduced rheology and filtration control if the fluid is exposed to higher temperature for prolonged periods of time. Formulating a drilling fluid system that can adequately withstand drilling in a high temperature ...

This paper is aimed at studying AEROSIL® R816 nanoparticle behaviour to see if it has enough feasibility to be used as a chemical agent in enhanced oil recovery (EOR) processes. The main focus is on interfacial and rheological behaviour of this particle in aqueous and polymeric media. Interfacial tension measurements between aqueous nanoparticle suspensions and oil showed that AEROSIL® R816 ...

In this paper, we present a new kinematic shearing apparatus named “1?2?,” which has been developed at the Institut de Mécanique de Grenoble (IMG) with the financial support of the GRECO Géomatériaux. Thanks to its kinematic control, a specimen may be subjected to conditions found in general plane strain. Our aim is to study the rheology of granular material in situations with rotation of strain ...

The Orange County Sanitation District (OCSD) is implementing a Capital Improvements Program that includes upgrading their wastewater treatment Plant No. 1 in Fountain Valley, California to full secondary treatment. The expansion will increase both primary and secondary solids production. OCSD prepared a Long-Range Biosolids Management Plan that concluded the waste solids should continue to be ...

Grease waste (GW) is an adequate substrate for sewage sludge co-digestion since, coming from a waste water treatment plant, it has a high methane potential (489 NmLCH4/gVSin); however, no synergistic effect takes place when co-digesting with 52%VS grease. Conversely, thermal hydrolysis (TH) improves the anaerobic digestion of GW (43% higher kinetics) and biological sludge ...

This study evaluates the rheological properties of beneficiated mud using factorial design. Four-speed rheometer was used to determine the shear stress at different shear rates from which rheological properties were determined. The effect of increase in concentration of Gum Arabic and sodium carbonate on apparent viscosity at different mass of clay sample was investigated. Simultaneous increase ...

Abstract Over the last ten years, a variety of pre-treatment technologies have emerged claiming to optimise anaerobic digestion. Of all these technologies, biological hydrolysis (Monsal Enzymic Hydrolysis) is the most widely adopted technology in the UK. Monsal Enzymic Hydrolysis has now been selected for eleven plants; eight operational, one under construction, and two in design, and the ...

The tyre provides the only connection between vehicle and road. Therefore, tyre performance is essential for the passengers' safety and comfort. Especially in winter the tyre can improve the vehicle handling and safety. For that reason, the winter tyre development gains more and more attention. Due to the special environmental demands for winter tyre tests the development process for winter tyres ...

Silicate–based gels are used in water diversion treatments for its low cost and environmental safety. In this paper, a new hydrogel with an interpenetrating network is developed based on three components, sodium silicate (Na2O.mSi2O), hydrolysed polyacrylamide (HPAM) and an activator. The interpenetrating network of ...

To assess performance and evaluate alternatives to improve the efficiency of rectangular Gould II type final settling tanks (FSTs), New York City Department of Environmental Protection and City College of NY developed a 3D computer model depicting the actual structural configuration of the tanks and the current and proposed hydraulic and solids loading rates. Fluent 6.3.26™ was the base platform ...

Wastewater sludge with solids concentrations above about 2 percent exhibit non-Newtonian behavior, i.e., the sludge apparent viscosity changes with the shear rate (flow velocity). To determine pipeline head loss for sludge streams to and from anaerobic digesters, samples of primary, secondary and digested sludge were collected from Orange County Sanitation District Plant No. 1 and analyzed to ...

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